Place the yogurt in a mesh strainer that has been lined with cheesecloth. Allow it to drain for at least 3 hours at room temperature, or in refrigerator overnight. In meantime, combine the raspberries and sugar in a glass or ceramic batter bowl. Cook in microwave 3 minutes, Stir well. Cook another 2-3 minutes, or until berries are cooked and the sugar has dissolved. Set aside to cool and to firm up ("jam up"). When ready to serve, discard the liquid from the yogurt and place the "cheese" in a bowl. Stir some green onions into the yogurt along with some or all of the raspberry jam to make a spread or a dip, as desired. Arrange crackers and vegetables on a platter and serve with the raspberry cheese!